diff --git a/gtsam/slam/EssentialMatrixConstraint.h b/gtsam/slam/EssentialMatrixConstraint.h
index 92a78279b..179200fe1 100644
--- a/gtsam/slam/EssentialMatrixConstraint.h
+++ b/gtsam/slam/EssentialMatrixConstraint.h
@@ -103,6 +103,9 @@ private:
             boost::serialization::base_object<Base>(*this));
     ar & BOOST_SERIALIZATION_NVP(measuredE_);
   }
+
+public:
+  EIGEN_MAKE_ALIGNED_OPERATOR_NEW
 };
 // \class EssentialMatrixConstraint